Ubuntu rootfs

rootfs-builder/rootfs.sh

@@ -116,6 +116,7 @@ ENV PATH=\$PATH:\$GOROOT/bin:\$GOPATH/bin
 	sed \
 		-e "s|@GO_VERSION@|${GO_VERSION}|g" \
 		-e "s|@OS_VERSION@|${OS_VERSION}|g" \
+		-e "s|@OS_NAME@|${OS_NAME}|g" \
 		-e "s|@INSTALL_GO@|${install_go//$'\n'/\\n}|g" \
 		${dockerfile_template} > Dockerfile
 	popd
@@ -193,16 +194,17 @@ if [ -n "${USE_DOCKER}" ] ; then
 		--env https_proxy="${https_proxy}" \
 		--env http_proxy="${http_proxy}" \
 		--env AGENT_VERSION="${AGENT_VERSION}" \
-		--env ROOTFS_DIR="/rootfs" \
+		--env ROOTFS_DIR="${ROOTFS_DIR}" \
 		--env GO_AGENT_PKG="${GO_AGENT_PKG}" \
 		--env AGENT_BIN="${AGENT_BIN}" \
 		--env AGENT_INIT="${AGENT_INIT}" \
 		--env GOPATH="${GOPATH}" \
 		--env KERNEL_MODULES_DIR="${KERNEL_MODULES_DIR}" \
 		-v "${script_dir}":"/osbuilder" \
-		-v "${ROOTFS_DIR}":"/rootfs" \
+		-v "${ROOTFS_DIR}":"${ROOTFS_DIR}" \
 		-v "${kernel_mod_dir}":"${kernel_mod_dir}" \
 		-v "${GOPATH}":"${GOPATH}" \
+		--privileged \
 		${image_name} \
 		bash /osbuilder/rootfs.sh "${distro}"
 

rootfs-builder/ubuntu/Dockerfile.in

@@ -0,0 +1,6 @@
+From ubuntu:@OS_NAME@
+
+RUN apt-get update && apt-get install -y git systemd debootstrap build-essential
+
+# This will install the proper golang to build Kata components
+@INSTALL_GO@

rootfs-builder/ubuntu/config.sh

@@ -0,0 +1,19 @@
+#
+# Copyright (c) 2018 Yash Jain
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+# architecture to build the rootfs for
+ARCH=${ARCH:-"amd64"}
+
+# url to download rootfs from
+ARCHIVE_URL=${ARCHIVE_URL:-"http://archive.ubuntu.com/ubuntu/"}
+
+# this should be ubuntu's codename eg Xenial for 16.04
+OS_NAME=${OS_NAME:-"xenial"}
+
+# packages to be installed by default
+PACKAGES="systemd iptables"
+
+DEBOOTSTRAP=${PACKAGE_MANAGER:-"debootstrap"}

rootfs-builder/ubuntu/rootfs_lib.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+#
+# Copyright (c) 2018 Yash Jain
+#
+# SPDX-License-Identifier: Apache-2.0
+
+set -e
+
+check_program(){
+	type "$1" >/dev/null 2>&1
+}
+
+
+
+build_rootfs()
+{
+	# Mandatory
+	local ROOTFS_DIR=$1
+
+	# In case of support EXTRA packages, use it to allow
+	# users add more packages to the base rootfs
+	local EXTRA_PKGS=${EXTRA_PKGS:-""}
+
+
+	check_root
+	mkdir -p "${ROOTFS_DIR}"
+
+	if [ -n "${PKG_MANAGER}" ]; then
+		info "debootstrap path provided by user: ${PKG_MANAGER}"
+	elif check_program $DEBOOTSTRAP ; then
+		PKG_MANAGER=$DEBOOTSTRAP
+	else
+		die "$DEBOOTSTRAP is not installed"
+	fi
+
+    # trim whitespace
+    PACKAGES=$(echo $PACKAGES |xargs )
+    EXTRA_PKGS=$(echo $EXTRA_PKGS |xargs)
+
+    # add comma as debootstrap needs , separated package names.
+    # Don't change $PACKAGES in config.sh to include ','
+    # This is done to maintain consistency
+    PACKAGES=$(echo $PACKAGES | sed  -e 's/ /,/g' )
+    EXTRA_PKGS=$(echo $EXTRA_PKGS | sed  -e 's/ /,/g' )
+
+    # extra packages are added to packages and finally passed to debootstrap
+    if [ "${EXTRA_PKGS}" = "" ]; then
+        echo "no extra packages"
+    else
+        PACKAGES="${PACKAGES},${EXTRA_PKGS}"
+    fi
+
+    ${PKG_MANAGER} --variant=minbase \
+                --arch="${ARCH}" \
+                --include="$PACKAGES" \
+                "${OS_NAME}" \
+                "${ROOTFS_DIR}"\
+                "${ARCHIVE_URL}"
+}
+
+
+check_root()
+{
+	if [ "$(id -u)" != "0" ]; then
+		echo "Root is needed"
+		exit 1
+	fi
+}